KR100723957B1 - The injection shotcrete device - Google Patents

Abstract

The present invention relates to a spraying apparatus for transporting and spraying materials (cement, mortar, aggregate, etc.) to slopes of tunnels or excavated surfaces of tunnel constructions where there is a risk of collapse. The present invention relates to a pumping device configured to pressurize material at high pressure by directly applying high pressure compressed air to a material continuously fed through an input wheel by suppressing air leakage as much as possible.

The present invention is a hopper provided with a stopper for opening and closing the supply of material, and a stopper for opening and closing for the input of the supplied material is provided with an injection pipe and exhaust pipe that is supplied from the hopper and the compressed air is injected and exhausted A chamber provided with a chamber, a tank having an input chamber in a space extended in the conveying direction of the material by stirring and conveying the material injected from the chamber to one side, and intermittently installed in the input chamber of the tank to rotate and continuously transfer a predetermined amount of material. It is characterized by consisting of an inlet wheel and an air inlet and outlet for pumping the material fed into the inlet wheel with high pressure compressed air.

Shotcrete, Compressed Air, Chamber, Feed Wheel

Description

High pressure continuous ejection device {The injection shotcrete device}

1 is a cross-sectional view showing an installation state according to a preferred embodiment of the present invention

2 to 4 is a cross-sectional view showing the operating state of the material input state according to the present invention

Figure 5 is a cross-sectional view of the operating state showing the exhaust state of the compressed air according to the present invention

Figure 6 is a side cross-sectional view of the input chamber showing a material input state according to the present invention

7 is a perspective view showing the input wheel according to the present invention

8 is a sectional view showing the principal parts of a material discharging state according to the present invention;

9 is a cross-sectional view of the main portion of the tank according to the present invention.

{Description of symbols for main parts of the drawing}

1: hopper 2: stopper

10: chamber 11: drive shaft

12: stirring blade 13: stopper

20: injection pipe 21: exhaust pipe

30: tank 31: drive shaft

32: input chamber 33: damper

40: air injection port 41: discharge port

50: feed wheel 51: feed wing

The present invention relates to a spraying device for spraying and spraying materials (cement, mortar, aggregate, etc.) to slopes of tunnels or excavated surfaces of tunnel constructions where there is a risk of collapse. The present invention relates to a blowing device configured to pressurize the material at a high pressure by directly applying high pressure compressed air to a material continuously injected through an input wheel by suppressing leakage of compressed air injected at a high pressure.

In general, the construction area or tunnel construction area has a high risk of collapse due to rainy season rain and rock layer cracking. Therefore, such road slopes, embankments, slopes, tunnel excavation surfaces, etc. High pressure injection of shotcrete (Shotcrete) is being constructed.

The shotcrete method protects the surface layer by compressing concrete or cement mortar on the slope of the construction site or the excavation surface of the tunnel using high pressure compressed air and spraying it at high pressure on the slope or excavation surface to prevent stress concentration. It is also called gunite to suppress rock cracking and to stabilize the excavated surface by supporting.

When pouring shotcrete, a fastener is used to accelerate the hardening of concrete or cement mortar to accelerate the development of initial strength and to increase the supporting effect.These fasteners are divided into powder type and liquid type according to their shape. Usually liquid quickeners are used, and dry shotcrete is a powdery quickener.

Most of the equipment for pouring shotcrete is installed on a trailer to be integrated into a vehicle or towed into a vehicle, and supplies cement, mortar, aggregate, etc. in mixed concrete and dry powder from a separate external ready-mixed concrete or mixing device. Using a separate high pressure compressor (Compressor) through the transfer hose is connected to the slope of the construction area or the excavation surface of the tunnel construction area by spraying high pressure shotcrete.

The device for spraying shotcrete on the slope of the existing construction site or the excavation surface of the tunnel construction area is disclosed in Korean Patent Application No. 1992-0022011 (Shotcrete using pneumatic cylinder) and Patent No. 10-0457978 (Casting) A dry spray process of a refractory material) has been proposed.

However, the above-described conventional blowing device does not smoothly supply the material inside the chamber, and in particular, the high pressure compressed air applied to the material from the air inlet inside the chamber is compressed by excessive leakage at the discharge part of the chamber. Not only the pressure of the air was not directly applied to the material, but also the pressure of the compressed air was so low that the material could not be pushed to high pressure.

The present invention has been made to solve the problems according to the existing blowing device as described above, by continuously suppressing the leakage of compressed air injected at high pressure in the discharge portion is discharged under the pressure of the material is compressed air continuously through the input wheel It is a main object of the present invention to provide a spraying device configured to directly press high-pressure compressed air to an input material to pressurize the material at a high pressure.

The main features of the present invention for realizing the above object;

A hopper provided with a stopper for opening and closing the material for supplying the material, an inlet pipe and exhaust pipe through which the material is supplied from the hopper and the compressed air is injected and exhausted, and a chamber equipped with a stopper for opening and closing the material for feeding the supplied material; A tank provided with an input chamber to a space extended in the conveying direction of the material by stirring and conveying the material injected from the chamber to one side, and an input wheel which is inserted and inserted into the input chamber of the tank to rotate and continuously feed the predetermined amount of material; , The air inlet and discharge port for transporting the material to be transferred to the input wheel to the high pressure compressed air.

Referring to Figures 1 to 9 shown in the drawings the configuration according to a preferred embodiment of the present invention in detail as follows.

According to a preferred embodiment of the present invention, a hopper 1 is provided with a material (cement, mortar, aggregate, etc.) supplied from a conveyor or a separate supply device at an upper portion thereof, and a predetermined amount of material is provided at a lower opening of the hopper 1. In order to supply, a stopper (2) for opening and closing is installed, where the stopper (2) is a structure of a link (3) in the shape of a pointed cone at the center, and the stopper (2) moves up and down as the lever is moved up and down. It is provided to open and close the opening part of (1).

At the bottom of the hopper 1 is provided a chamber 10 through which material is supplied from the hopper 1, and an injection pipe 20 and an exhaust pipe 21 through which compressed air is injected and exhausted at both sides of the chamber 10. A conical stopper 13 is provided in the lower opening for opening and closing of the material supplied from the hopper 1, and the stopper 13 is opened and closed by vertically acting as a link 14. .

The chamber 10 may be configured in the shape of a sphere or in the shape of a hemisphere, the stopper (2) 13 is installed in the upper and lower openings, respectively, is configured to be sealed, the compressed air injection and exhaust Valves are respectively mounted on the injection pipe 20 and the exhaust pipe 21 to be installed, and the valve may be provided with an electromagnetic valve that is automatically opened and closed by an electrical signal, and also a stopper 2 installed in the hopper 1 and the chamber 10. ) 13 may also be installed to be automatically opened or closed by pneumatic or hydraulic.

On the other hand, the inside of the chamber 10, the drive shaft 11 that is rotated by receiving the driving force of the motor (M) is rotatably installed, a plurality of stirring blades 12 are mounted on the drive shaft 11 to mix the supplied material Stir to smooth feed.

In the exemplary embodiment of the present invention, a tank 30 having a predetermined length is disposed horizontally below the chamber 10 to feed material from the chamber 10, and the tank 30 has a plurality of transfer blades 31a therein. The drive shaft 31 is mounted to be rotatable and is rotated by receiving the driving force of the motor M. In the above, the transfer blade 31a has a predetermined angle so that the material injected from the chamber 10 can be transferred to one side. Attach and install.

In addition, the tip portion in the direction in which the material is transferred from the tank 30 is provided with an injection chamber 32 into a space of a predetermined size extended than the internal space of the tank 30, the injection chamber 32 to have a cylindrical shape It is preferable that the configuration, and a plurality of feed blades 51 is inserted into the radially inserted input wheel 50 therein, the insertion wheel 50 has a central portion is mounted to the drive shaft 31 to the driving force of the motor (M) Rotate

Therefore, the tank 30 rotates the drive shaft 31 and the transfer blade 31a by the driving force of the motor M to transfer the material introduced from the chamber 10 to one side, and to one of the front end portions of the material transfer direction. The input chamber 32 is configured as an expanded space, and the input wheel 50 in which the plurality of transfer blades 51 are radially inserted in the input chamber 32 is interpolated to rotate together with the drive shaft 31.

In the embodiment of the present invention is inserted into the injection chamber 32 of the tank 30 is rotated with the drive shaft 31, the injection wheel 50, as shown in Figure 7, a plurality of transfer wings on the outer periphery of the circular plate 51 is formed radially to have a predetermined interval, the feed blade 51 in the injection wheel 50 is formed into an area that can be interpolated corresponding to the expanded space of the input chamber 32, a circular plate Is formed to protrude in the longitudinal direction of the tank (30).

On the other hand, the air inlet 40 and the outlet 41 of the function of injecting high-pressure compressed air supplied from a separate high-pressure compressor to eject and transport the material, as shown in Figure 6, the drive shaft at the lower end of the input chamber 32 (31) are arranged to have a predetermined acute angle in the direction of rotation and are attached to both sides of the input chamber (32) to coincide with each other.

The damper 33 having a function of preventing leakage of compressed air is installed at an end portion adjacent to the tank 30 and the inlet chamber 32 at the position where the air inlet 40 and the outlet 41 are attached. 6 and 8, the damper 33 is close to the circular plate of the input wheel 50 at the end adjacent to the tank 30 and the input chamber 32, the transfer formed in the input wheel 50 It is formed with an area larger than the spacing of the wings 51.

Meanwhile, in the embodiment of the present invention, the tank 30 may be installed in a double structure by attaching a rubber plate 30a to an inner circumferential surface made of a metal iron plate, as shown in FIG. 9, and the structure diagram of the chamber 10 tank 30. Can be installed in a double structure in the same manner as

Looking at the operation process according to a preferred embodiment of the present invention made of such a configuration as follows.

First, when the stopper 2 provided in the opening of the hopper 1 is opened, the material is supplied from the conveyor or a separate supply device, and the material is supplied to the chamber 10 through the hopper 1 and the stopper 2. Next, the stopper 2 installed in the hopper 1 is closed and high pressure compressed air is injected into the chamber 10 through the injection tube 20. When compressed air is injected into the chamber 10, the chamber 10 is closed. As the stopper 13 provided in the opening is opened, the material is introduced into the tank 30.

When the material is introduced from the chamber 10 to the tank 30 in the above, the stopper 13 installed in the opening of the chamber 10 is closed, the exhaust pipe 21 is opened, the compressed air injected into the chamber 10 to the outside When the compressed air is discharged to some extent from the chamber 10, the exhaust pipe 21 is closed and the stopper 2 installed in the opening of the hopper 1 is opened again, and the material is introduced into the chamber 10. It is repeated repeatedly.

The operation of the stopper (2) 13 and the injection or exhaust of compressed air into the interior of the chamber (10) is the compressed air chamber inside the tank 30 when the material is introduced into the tank (30) It flows back to 10 so that the internal pressure of the tank 30 is not lowered and a constant pressure is always maintained.

The material introduced into the tank 30 by the input process of the material is gradually stirred and transferred in the direction in which the injection chamber 32 is located in the tank 30 by the rotation of the drive shaft 31 and the transfer blade 31a, and the tank The material flowing into the input chamber 32 of the expanded space at 30 is a predetermined amount by the feed blade 51 of the input wheel 50 rotated by the drive shaft 31, the air inlet 40 and the discharge port 41 ) Is transferred to the position where it is placed.

That is, when the material conveyed by stirring by the rotation of the drive shaft 31 and the feed blade 31a in the tank 30 flows into the feed chamber 32 in which the feed wheel 50 rotates by the drive shaft 31, the feed wheel Between the plurality of transfer blades 51 formed in the 50 is pushed by the transfer blade 51 is rotated and transported to the position where the air inlet 40 and the discharge port 41 is disposed, the position where the air inlet 40 is disposed When the high pressure compressed air is injected into the inlet chamber 32 from the air inlet 40, the material loaded between the transfer blades 51 of the inlet wheel 50 receives the pressure of the compressed air and is installed on the opposite side. It is discharged to the discharge port 41 and conveyed.

When the high pressure compressed air is injected into the injection chamber 32 from the air injection port 40, the damper 33 is transferred from the injection wheel 50 at the end adjacent to the tank 30 and the injection chamber 32. (51) By sealing the interspace, the leakage of compressed air can be suppressed to the maximum and the material can be conveyed at high pressure.

The preferred embodiments of the present invention have been described above with reference to the present invention, and are not limited to the above embodiments, and those skilled in the art through the above embodiments do not depart from the gist of the present invention. Can be implemented in a variety of changes.

As described above, according to an embodiment of the present invention, while stirring the material in the tank in which the material is introduced from the hopper and the chamber, the input wheel and the feeding wheel formed with a plurality of feed vanes are rotatably installed in the expanded space in the tank. In addition, by forming a damper at an end portion adjacent to the tank and the input chamber, the leakage of compressed air injected at high pressure from the discharge portion where the material is discharged under the pressure of the compressed air is minimized, and the compressed air of high pressure is directly applied to the material. It is to provide an effect of feeding the high pressure.

Claims (8)

A hopper provided with a stopper for opening and closing the material for supplying the material, an inlet pipe and exhaust pipe through which the material is supplied from the hopper and the compressed air is injected and exhausted, and a chamber equipped with a stopper for opening and closing the material for feeding the supplied material; An air inlet and discharge device comprising: an inlet wheel for conveying and feeding the material introduced from the chamber to the discharge unit; and an air inlet and a discharge port for pumping the material fed into the inlet wheel into high pressure compressed air; A tank (30) provided with an input chamber (32) in a space extended in the conveying direction of the material by stirring and conveying the material introduced from the chamber (10) to one side; An input wheel 50 interpolated in the input chamber 32 of the tank 30 to rotate and continuously feed and feed a predetermined amount of material; High-pressure continuous discharge type spraying device, characterized in that consisting of the air injection port 40 and the discharge port 41 for pumping the material to be transferred to the injection wheel 50 with high-pressure compressed air. The method of claim 1; The tank 30 is a high-pressure continuous discharge type spraying device, characterized in that the drive shaft 31 is installed rotatably mounted with a plurality of transfer blades (31a) therein and configured to rotate by receiving the driving force of the motor (M). The method of claim 1; The injection chamber 32 provided in the tank 30 is formed in a space having a predetermined size extended from the internal space of the tank 30, and the high-pressure continuous discharge type spraying device, characterized in that configured to have a cylindrical shape. The method of claim 1; Injecting wheel 50 is a high-pressure continuous discharge type spraying device, characterized in that formed on the outer periphery of the circular plate radially so that a plurality of transfer blades 51 having a predetermined interval. The method of claim 4; The feed vane 51 of the feeding wheel 50 is formed in an area that can be interpolated corresponding to the expanded space of the feeding chamber 32, and is formed to protrude in the longitudinal direction of the tank 30 in a circular plate. High pressure continuous discharge type spraying device. The method of claim 1; The air injection hole 40 and the discharge hole 41 are arranged to have a predetermined acute angle in the direction in which the drive shaft 31 rotates at the lower end of the injection chamber 32, and are installed to be coincident with both sides of the injection chamber 32. High pressure continuous discharge type spraying device. The method of claim 6; High pressure continuous discharge, characterized in that the damper 33 for preventing the leakage of compressed air at the end adjacent to the tank 30 and the input chamber 32 at the position where the air inlet 40 and the discharge port 41 is attached Mold blowing device. The method of claim 7; The damper 33 is formed near the circular plate of the input wheel 50 at the end where the tank 30 and the input chamber 32 are adjacent to each other, and is formed with an area larger than the distance between the transfer blades 51 formed on the input wheel 50. High pressure continuous discharge type spraying device, characterized in that.

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